Chapter 44 — REFERENCED STANDARDS

Notwithstanding California laws and regulations, these referenced standards shall be applicable only to those California Residential Code sections that are adopted.

User notes:

About this chapter: The one- and two-family dwelling code contains numerous references to standards promulgated by other organizations that are used to provide requirements for materials, products and methods of construction. Chapter 44 contains a comprehensive list of all standards that are referenced in this code. These standards, in essence, are part of this code to the extent of the reference to the standard.

This chapter lists the standards that are referenced in various sections of this document. The standards are listed herein by the promulgating agency of the standard, the standard identification, the effective date and title, and the section or sections of this document that reference the standard. The application of the referenced standards shall be as specified in Section R102.4.

ABTG Applied Building Technology Group LLC6300 Enterprise Lane Madison, WI 53719

ANSI/ABTG FS 100—2012 (R2018): Standard Requirements for Wind Pressure Resistance of Foam Plastic Insulation Sheathing Used in Exterior Wall Covering Assemblies

R303.8

ACCA Air Conditioning Contractors of America 1330 Braddock Place, Suite 350 Alexandria, VA 22314

ANSI/ACCA 2 Manual J—2016: Residential Load Calculation

Table R301.2

ACI American Concrete Institute 38800 Country Club Drive Farmington Hills, MI 48331

318—19: Building Code Requirements for Structural Concrete R402.2, R404.1.3, R404.1.3.1, Table R404.1.3.2(2), Table R404.1.3.2(5), Table R404.1.3.2(6), Table R404.1.3.2(7), Table R404.1.3.2(8), R404.1.3.3, R404.1.3.4, R404.1.4.2, R404.5.1, R608.1, R608.1.1, R608.1.2, R608.2, R608.5.1, R608.6.1, R608.8.2, R608.9.2, R608.9.3

332—20: Residential Code Requirements for Structural Concrete

R402.2, R403.1, R404.1.3, R404.1.3.4, R404.1.4.2, R506.1

AISI American Iron and Steel Institute 25 Massachusetts Avenue, NW Suite 800 Washington, DC 20001

AISI S100—16 (2020) w/S2—20: North American Specification for the Design of Cold-Formed Steel Structural Members, 2016 Edition (Reaffirmed 2020), with Supplement 2, 2020 Edition

R608.9.2, R608.9.3

AISI S220—20: North American Standard for Cold-Formed Steel Nonstructural Framing, 2020 Edition

R702.3.3

AISI S230—19: North American Standard for Cold-Formed Steel Framing—Prescriptive Method for One and Two Family Dwellings, 2019 Edition

R301.1.1, R301.2.1.1, R301.2.2.7, R301.2.2.8, R603.6, R603.9.4.1, R603.9.4.2, Figure R608.9(11), R608.9.2, R608.9.3, R608.10

AISI S240—20: North American Standard for Cold-Formed Steel Structural Framing, 2020 Edition

R505.1.3, R603.6, R702.3.3, R804.3.6

ALI Automotive Lift Institute, Inc. PO Box 85 Cortland, NY 13045

ALI ALCTV—2017: Standard for Automotive Lifts—Safety Requirements for Construction, Testing and Validation (ANSI)

R317.7

ANSI American National Standards Institute 25 West 43rd Street, 4th Floor New York, NY 10036

A108.1A—17: Installation of Ceramic Tile in the Wet-Set Method, with Portland Cement Mortar

R702.4.1

on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

REFERENCED STANDARDS

A108.1B—2017: Installation of Ceramic Tile on a Cured Portland Cement Mortar Setting Bed with Dry-Set or Latex Portland

Cement Mortar

R702.4.1

A108.4—19: Installation of Ceramic Tile with Organic Adhesives or Water-cleanable Tile-setting Epoxy Adhesive

R702.4.1

A108.5—21: Setting of Ceramic Tile with Dry-Set Cement Mortar, Modified Dry-Set Cement Mortar, EGP (Exterior Glue Plywood) Modified Dry-Set Cement Mortar, or Improved Modified Dry-Set Cement Mortar

R702.4.1

A108.6—99 (R2019): Installation of Ceramic Tile with Chemical Resistant, Water Cleanable Tile-Setting and -Grouting Epoxy

R702.4.1

A108.11—18: Interior Installation of Cementitious Backer Units

R702.4.1

A118.1—19: American National Standard Specifications for Dry-Set Portland Cement Mortar

R702.4.1

A118.3— 13 : American National Standard Specifications for Chemical-Resistant, Water-Cleanable Tile-Setting and -Grouting Epoxy and Water Cleanable Tile-Setting Epoxy Adhesive

R702.4.1

A118.4—19: American National Standard Specifications for Modified Dry-Set Cement Mortar

R606.2.11

A136.1—20: American National Standard Specifications for Organic Adhesives for Installation of Ceramic Tile

R702.4.1

A137.1—22: American National Standard Specifications for Ceramic Tile

R702.4.1

ANSI 117—2020: Standard Specification for Structural Glued Laminated Timber of Softwood Species

R502.1.3, R602.1.3, R802.1.3

S3.41: American National Standard Audible Evacuation Signal

R335.5.2.1

Z97.1—2015 (R2020): Safety Glazing Materials Used in Buildings—Safety Performance Specifications and Methods of Test

R324.1.1, R324.3.1

APA APA—The Engineered Wood Association 7011 South 19th Street Tacoma, WA 98466

ANSI/APA A190.1—2022: Product Standard for Structural Glued-laminated Timber

R502.1.3, R602.1.3, R802.1.2

ANSI/APA PRG 320—2019: Standard for Performance-rated Cross Laminated Timber

R502.1.6, R602.1.6, R802.1.5

ANSI/APA PRP 210—2019: Standard for Performance-rated Engineered Wood Siding R604.1, Table R703.3(1), R703.3.4

ANSI/APA PRR 410—2021: Standard for Performance-rated Engineered Wood Rim Boards

R502.1.7, R602.1.7, R802.1.6

ANSI/APA PRS 610.1—2023: Standard for Performance-Rated Structural Insulated Panels in Wall Applications

R602.1.11, R610.3, R610.4

APA E30—19: Engineered Wood Construction Guide Table R503.2.1.1(1), R503.2.2, R803.2.2, R803.2.3

ASCE/SEI American Society of Civil Engineers Structural Engineering Institute Reston, VA 20191-4400

7—2022: Minimum Design Loads and Associated Criteria for Buildings and Other Structures R301.2.1.1, R301.2.1.2, R301.2.1.5, R301.2.1.5.1, Table R608.6(1), Table R608.6(2), Table R608.6(3), Table R608.6(4), Table R608.7.1.1(1), Table R608.7.1.1(2), Table R608.7.1.1(3), R608.9.2, R608.9.3, R609.2, R609.6.2

24—14: Flood Resistant Design and Construction

R301.2.4, R301.2.4.1, R306.1, R306.1, R306.1.1, R306.1.6, R306.1.9, R306.2.2, R306.3.3

32—01: Design and Construction of Frost-protected Shallow Foundations

R403.1.4.1

44-4 2025 CALIFORNIA RESIDENTIAL CODE

on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

REFERENCED STANDARDS

ASME American Society of Mechanical Engineers Two Park Avenue New York, NY 10016-5990

A18.1—2023: Safety Standard for Platforms and Stairway Chair Lifts

R323.2

ASME A17.1—2022/CSA B44—2022: Safety Code for Elevators and Escalators

R323.1

ASTM ASTM International 100 Barr Harbor Drive, P.O. Box C700 West Conshohocken, PA 19428

A36/A36M—19: Specification for Carbon Structural Steel

R608.5.2.2

A53/A53M—2020: Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated Welded and Seamless

R407.3

A123/A123M—2017: Standard Specification for Zinc (Hot-Dip Galvanized) Coatings on Iron and Steel Products

Table R507.2.3

A153/A153M—2016A: Specification for Zinc Coating (Hot-Dip) on Iron and Steel Hardware R304.3, Table R507.2.3, Table R606.3.4.1, R703.6.3, R905.7.6, R905.8.7

A167—99(2009): Specification for Stainless and Heat-resisting Chromium-Nickel Steel Plate, Sheet and Strip

Table R606.3.4.1

A240/A240M—20a: Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet and Strip for Pressure Vessels and for General Applications Table R905.10.3(1)

A307—21: Standard Specification for Carbon Steel Bolts, Studs, and Threaded Rod 60,000 PSI Tensile Strength Table R507.2.3, R608.5.2.2

A463/A463M—15(2020)e1: Standard Specification for Steel Sheet, Aluminum-Coated by the Hot-dip Process Table R905.10.3(2)

A563/A563M—21a: Standard Specification for Carbon and Alloy Steel Nuts

Table R507.2.3

A615/A615M—20: Standard Specification for Deformed and Plain Carbon-Steel Bars for Concrete Reinforcement

R402.3.1, R403.1.3.5.1, R404.1.3.3.7.1, R608.5.2.1

A641/A641M—19: Specification for Zinc-coated (Galvanized) Carbon Steel Wire Table R507.2.3, Table R606.3.4.1, R703.6.3, R905.7.6, R905.8.7

A653/A653M—20: Standard Specification for Steel Sheet, Zinc-Coated (Galvanized) or Zinc-Iron Alloy-Coated (Galvannealed) by the Hot-Dip Process R505.2.2, Table R507.2.3, R603.2.2, Table R606.3.4.1, R608.5.2.3, R804.2.2, R804.2.3, Table R905.10.3(1), Table R905.10.3(2)

A706/A706M—2016: Standard Specification for Deformed and Plain Low Alloy Bars for Concrete Reinforcement

R402.3.1, R403.1.3.5.1, R404.1.3.3.7.1, R608.5.2.1

A755/A755M—18: Specification for Steel Sheet, Metallic Coated by the Hot-Dip Process and Prepainted by the Coil-Coating Process for Exterior Exposed Building Products Table R905.10.3(2)

A792/A792M—21a: Specification for Steel Sheet, 55% Aluminum-zinc Alloy-Coated by the Hot-Dip Process R505.2.2, R603.2.2, R608.5.2.3, R804.2.2, Table R905.10.3(2)

A875/A875M—21: Specification for Steel Sheet, Zinc-5%, Aluminum Alloy-Coated by the Hot-Dip Process R608.5.2.3, Table R905.10.3(2)

A924/A924M—20: Standard Specification for General Requirements for Steel Sheet, Metallic-Coated by the Hot-Dip Process Table R905.10.3(1)

A996M—2016: Specifications for Rail-Steel and Axle-Steel Deformed Bars for Concrete Reinforcement R403.1.3.5.1, Table R404.1.3.2(9), R404.1.3.3.7.1, R608.5.2.1, Table R608.5.4(2)

A1003/A1003M—15: Standard Specification for Steel Sheet, Carbon, Metallic and Nonmetallic-Coated for Cold-Formed Framing Members

R505.2.1, R505.2.2, R603.2.1, R603.2.2, R804.2.1, R804.2.2

B101—12(2019): Specification for Lead-Coated Copper Sheet and Strip for Building Construction Table R905.2.8.2, Table R905.10.3(1)

B209—21: Standard Specification for Aluminum and Aluminum-Alloy Sheet and Plate Table R905.10.3(1)

on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

REFERENCED STANDARDS

B370—12(2019): Specification for Copper Sheet and Strip for Building Construction Table R905.2.8.2, Table R905.10.3(1)

B695—2021: Standard Specification for Coatings of Zinc Mechanically Deposited on Iron and Steel

Table R507.2.3

C5—2018: Specification for Quicklime for Structural Purposes

R702.2.1

C22/C22M—00(2021): Specification for Gypsum

R702.2.1, R702.3.1

C27—1998(2018): Specification for Standard Classification of Fireclay and High-Alumina Refractory Brick

R1001.5

C28/C28M—10(2020): Specification for Gypsum Plasters

R702.2.1

C33/C33M—2018: Specification for Concrete Aggregates

R403.4.1

C34—2017: Standard Specification for Structural Clay Loadbearing Wall Tile Table R301.2(1), R606.2.2

C35/C35M—01(2019): Standard Specification for Inorganic Aggregates for Use in Gypsum Plaster

R702.2.1

C55—2017: Specification for Concrete Building Brick R202, Table R301.2(1), R606.2.1

C56—2013(2017): Standard Specification for Structural Clay Nonloadbearing Tile

R606.2.2

C59/C59M—00(2020): Specification for Gypsum Casting Plaster and Molding Plaster

R702.2.1

C61/C61M—00(2020): Specification for Gypsum Keene’s Cement

R702.2.1

C62—2017: Standard Specification for Building Brick (Solid Masonry Units Made from Clay or Shale) R202, Table R301.2(1), R606.2.2

C73—2017: Specification for Calcium Silicate Brick (Sand-Lime Brick) R202, Table R301.2(1), R606.2.1

C90—21: Specification for Loadbearing Concrete Masonry Units Table R301.2(1), R606.2.1

C91/C91M—2018: Specification for Masonry Cement

R702.2.2, R703.7.2

C94/C94M—21b: Standard Specification for Ready-Mixed Concrete

R404.1.3.3.2, R608.5.1.2

C126—19: Standard Specification for Ceramic Glazed Structural Clay Facing Tile, Facing Brick, and Solid Masonry Units

R606.2.2

C129—2017: Specification for Nonload-Bearing Concrete Masonry Units Table R301.2(1)

C143/C143M—20: Test Method for Slump of Hydraulic Cement Concrete

R404.1.3.3.4, R608.5.1.4

C145—85: Specification for Solid Load-Bearing Concrete Masonry Units R202, Table R301.2(1)

C150/C150M—21: Specification for Portland Cement

R608.5.1.1, R702.7.2

C199—1984(2016): Test Method for Pier Test for Refractory Mortars

R1001.5, R1001.8, R1003.12

C207—2018: Specification for Hydrated Lime for Masonry Purposes

Table R606.2.8

C208—22: Specification for Cellulosic Fiber Insulating Board R602.1.10, Table R602.3(1), Table R906.2

C212—21: Standard Specification for Structural Clay Facing Tile

R606.2.2

44-6 2025 CALIFORNIA RESIDENTIAL CODE

on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

REFERENCED STANDARDS

C216—21: Specification for Facing Brick (Solid Masonry Units Made from Clay or Shale) R202, Table R301.2(1), R606.2.2

C270—19ae1: Specification for Mortar for Unit Masonry R606.2.8, Table R606.2.8, R606.2.11

C315—2007(2021): Specification for Clay Flue Liners and Chimney Pots R1001.8, R1003.11.1, Table R1003.14(1)

C406/C406M—2015: Specification for Roofing Slate

R905.6.4

C475/C475M—2017: Specification for Joint Compound and Joint Tape for Finishing Gypsum Board

R702.3.1

C476—20: Specification for Grout for Masonry

R606.2.12

C503/C503M—2015: Standard Specification for Marble Dimension Stone

R606.2.4

C514—04(2020): Standard Specification for Nails for the Application of Gypsum Board

R702.3.1

C552—22: Standard Specification for Cellular Glass Thermal Insulation

Table R906.2

C557—2003(2017): Specification for Adhesives for Fastening Gypsum Wallboard to Wood Framing

R702.3.1.1

C568M—2015: Standard Specification for Limestone Dimension Stone

R606.2.4

C578—19: Standard Specification for Rigid, Cellular Polystyrene Thermal Insulation R403.3, Table R703.8.4(2), Table R703.15.1, Table R703.15.2, Table R703.16.1, Table R703.16.2, Table R906.2

C587—2004(2018): Specification for Gypsum Veneer Plaster

R702.2.1

C595/C595M—21: Specification for Blended Hydraulic Cements

R608.5.1.1, R702.2.2, R703.7.2

C615/C615M—2018E1: Standard Specification for Granite Dimension Stone

R606.2.4

C616/C616M—2015: Standard Specification for Quartz-Based Dimension Stone

R606.2.4

C629/C629M—2015: Standard Specification for Slate Dimension Stone

R606.2.4

C631—09(2020): Standard Specification for Bonding Compounds for Interior Gypsum Plastering

R702.2.1

C645—2018: Specification for Nonstructural Steel Framing Members

R702.3.3

C652—21: Specification for Hollow Brick (Hollow Masonry Units Made from Clay or Shale) R202, Table R301.2(1), R606.2.2

C685/C685M—2017: Specification for Concrete Made by Volumetric Batching and Continuous Mixing

R404.1.3.3.2, R608.5.1.2

C726—2017: Standard Specification for Mineral Wool Roof Insulation Board

Table R906.2

C728—2017A: Standard Specification for Perlite Thermal Insulation Board

Table R906.2

C744—2021: Standard Specification for Prefaced Concrete and Calcium Silicate Masonry Units

R606.2.1

C836/C836M—2018(2022): Specification for High Solids Content, Cold Liquid-Applied Elastomeric Waterproofing Membrane for Use with Separate Wearing Course

R905.14.2

C841—2003(2018): Standard Specification for Installation of Interior Lathing and Furring

R702.2.1

on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

REFERENCED STANDARDS

C842—05(2021): Standard Specification for Application of Interior Gypsum Plaster

R702.2.1

C843—2017: Specification for Application of Gypsum Veneer Plaster

R702.2.1

C844—2015(2021): Specification for Application of Gypsum Base to Receive Gypsum Veneer Plaster

R702.2.1

C847—18: Specification for Metal Lath

R702.2.1, R702.2.2

C887—20: Specification for Packaged, Dry, Combined Materials for Surface Bonding Mortar

R406.1, R606.2.9

C897—15(2020): Specification for Aggregate for Job-Mixed Portland Cement-Based Plasters

R702.2.2

C920—2018: Standard Specification for Elastomeric Joint Sealants

R406.4.1

C926—21: Specification for Application of Portland Cement-Based Plaster

R702.2.2, R702.2.2.1, R703.7, R703.7.2, R703.7.2.1, R703.7.4

C933—2018: Specification for Welded Wire Lath

R702.2.1, R702.2.2

C946—2018: Standard Practice for Construction of Dry-Stacked, Surface-Bonded Walls

R606.2.9

C954—2018: Specification for Steel Drill Screws for the Application of Gypsum Panel Products or Metal Plaster Bases to Steel Studs from 0.033 in (0.84 mm) or to 0.112 in. (2.84 mm) in Thickness

R505.2.5, R603.2.5, R702.3.5.1, R804.2.5

C957/C957M—2017: Specification for High-Solids Content, Cold Liquid-Applied Elastomeric Waterproofing Membrane with Integral Wearing Surface

R905.14.2

C1002—20: Specification for Steel Self-Piercing Tapping Screws for the Application of Gypsum Panel Products or Metal Plaster Bases to Wood Studs or Steel Studs

R702.3.1, R702.3.5.1

C1029—20: Specification for Spray-Applied Rigid Cellular Polyurethane Thermal Insulation

R905.13.2

C1032—2018: Specification for Woven Wire Plaster Base

R702.2.1, R702.2.2

C1047—19: Specification for Accessories for Gypsum Wallboard and Gypsum Veneer Base

R702.2.1, R702.2.2, R702.3.1

C1063—21: Specification for Installation of Lathing and Furring to Receive Interior and Exterior Portland Cement-Based Plaster

R702.2.2, R703.7, R703.7.1

C1088—20: Standard Specification for Thin Veneer Brick Units Made from Clay or Shale

R606.2.2

C1107/C1107M—20: Standard Specification for Packaged Dry, Hydraulic-Cement Grout (Nonshrink)

R402.3.1

C1116/C116M—10(2015): Standard Specification for Fiber-Reinforced Concrete and Shotcrete

R402.3.1

C1157/C1157M—20a: Standard Performance Specification for Hydraulic Cement

R608.5.1.1, R703.7.2

C1167—2011(2017): Specification for Clay Roof Tiles

R905.3.4

C1177/C1177M—2017: Specification for Glass Mat Gypsum Substrate for Use as Sheathing R702.3.1, Table R906.2

C1178/C1178M—2018: Specification for Glass Mat Water-Resistant Gypsum Backing Panel R702.3.1, R702.3.7, Table R702.4.2

C1186—2008(2016): Specification for Flat Fiber Cement Sheets

R703.10.1, R703.10.2

44-8 2025 CALIFORNIA RESIDENTIAL CODE

on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

REFERENCED STANDARDS

C1261—2013(2017)E1: Specification for Firebox Brick for Residential Fireplaces

R1001.5, R1001.8

C1278/C1278M—2017: Specification for Fiber-Reinforced Gypsum Panels R702.3.1, R702.3.7, Table R702.4.2, Table R906.2

C1280—18: Specification for Application of Exterior Gypsum Panel Products for Use as Sheathing Table R602.3(1)

C1283—2015(2021): Practice for Installing Clay Flue Lining

R1003.9.1, R1003.12

C1288—2017: Standard Specification for Fiber-Cement Interior Substrate Sheets Table R503.2.1.1(1), Table R503.2.1.1(2), Table R602.3(2), Table R702.4.2

C1289—22: Standard Specification for Faced Rigid Cellular Polyisocyanurate Thermal Insulation Board R303.8, Table R703.15.1, Table R703.15.2, Table R703.16.1, Table R703.16.2, Table R906.2

C1325—21: Standard Specification for Fiber-Mat Reinforced Cementitious Backer Units

Table R702.4.2

C1328/C1328M—19: Specification for Plastic (Stucco) Cement

R702.2.2, R703.7.2

C1364—19: Standard Specification for Architectural Cast Stone

R606.2.5

C1396/C1396M—2017: Specification for Gypsum Board Table R602.3(1), R702.2.1, R702.2.2, R702.3.1, R702.3.7

C1405—20a: Standard Specification for Glazed Brick (Single Fired, Brick Units)

R606.2.2

C1492—2003(2016): Specification for Concrete Roof Tile

R905.3.5

C1513—2018: Standard Specification for Steel Tapping Screws for Cold-Formed Steel Framing Connections R505.2.5, R603.2.5, R702.3.5.1, Table R703.3(2), Table R703.16.1, Table R703.16.2, R804.2.5

C1634—20: Standard Specification for Concrete Facing Brick and Other Concrete Masonry Facing Units

R606.2.1

C1658/C1658M—19e1: Standard Specification for Glass Mat Gypsum Panels

R702.3.1

C1670/1670M—21b: Standard Specification for Adhered Manufactured Stone Masonry Veneer Units

R606.2.6

C1691—2021: Standard Specification for Unreinforced Autoclaved Aerated Concrete (AAC) Masonry Units

R606.2.3

C1693—2011(2017): Standard Specification for Autoclaved Aerated Concrete (AAC)

R606.2.3

C1766—2015(2019): Standard Specification for Factory-Laminated Gypsum Panel Products

R702.3.1

C1902—20: Standard Specification for Cellular Glass Insulation Used in Building and Roof Applications

Table R906.2

D41/D41M—2011(2016): Specification for Asphalt Primer Used in Roofing, Dampproofing and Waterproofing Table R905.9.2, Table R905.11.2

D43/D43M—2000(2018): Specification for Coal Tar Primer Used in Roofing, Dampproofing and Waterproofing

Table R905.9.2

D226/D226M—2017: Specification for Asphalt-Saturated Organic Felt Used in Roofing and Waterproofing R703.2, R905.1.1, Table R905.1.1(1), R905.8.4, Table R905.9.2

D227/D227M—2003(2018): Specification for Coal-Tar-Saturated Organic Felt Used in Roofing and Waterproofing

Table R905.9.2

D312/D312M—2016a: Specification for Asphalt Used in Roofing

Table R905.9.2

D422—63(2007)E2: Test Method for Particle-Size Analysis of Soils

R403.1.8.1

D449/D449M—03(2021): Specification for Asphalt Used in Dampproofing and Waterproofing

R406.2

on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

REFERENCED STANDARDS

D450/D450M—2017(2018): Specification for Coal-Tar Pitch Used in Roofing, Dampproofing and Waterproofing

Table R905.9.2

D1227—13(2019)e1: Specification for Emulsified Asphalt Used as a Protective Coating for Roofing Table R905.9.2, Table R905.11.2, R905.14.2, Table R909.2

D1863/D1863M—2005(2018): Specification for Mineral Aggregate Used on Built-Up Roofs

Table R905.9.2

D1970/D1970M—21: Specification for Self-adhering Polymer Modified Bitumen Sheet Materials Used as Steep Roof Underlayment for Ice Dam Protection

R905.1.1, Table R905.1.1(1), Table R905.1.1(2), R905.2.8.2, R905.11.2.1

D2178/D2178M—15A(2021): Specification for Asphalt Glass Felt Used in Roofing and Waterproofing

Table R905.9.2

D2626/D2626M—04 (2020): Specification for Asphalt-Saturated and Coated Organic Felt Base Sheet Used in Roofing R905.1.1, Table R905.1.1(1), Table R905.9.2,

D2822/D2822M—2005(2011)e1: Specification for Asphalt Roof Cement, Asbestos Containing

Table R905.9.2

D2823/D2823M—05(2011)e1: Specification for Asphalt Roof Coatings, Asbestos Containing Table R905.9.2, Table R909.2

D2824/D2824M—2018: Standard Specification for Aluminum-Pigmented Asphalt Roof Coatings, Nonfibered and Fibered without Asbestos

Table R905.9.2, Table R905.11.2, Table R909.2

D2898—2010(2017): Test Methods for Accelerated Weathering of Fire-Retardant-Treated Wood for Fire Testing

R302.15.4, R302.15.8

D3019/D3019—2017: Specification for Lap Cement Used with Asphalt Roll Roofing, Nonfibered, Asbestos Fibered and Nonasbestos Fibered

Table R905.9.2, Table R905.11.2

D3161/D3161M—20: Test Method for Wind Resistance of Steep Slope Roofing Products (Fan-Induced Method) R905.2.4.1, Table R905.2.4.1, R905.4.4.1, R905.6.5, Table R905.6.5, R905.15.6

D3201/D3201M—20: Test Method for Hygroscopic Properties of Fire-Retardant Wood and Wood-Base Products

R302.15.9

D3462/D3462M—19: Specification for Asphalt Shingles Made from Glass Felt and Surfaced with Mineral Granules

R905.2.4

D3468/D3468M—99 (2020): Specification for Liquid-Applied Neoprene and Chlorosulfonated Polyethylene Used in Roofing and Waterproofing

R905.14.2

D3679—21: Specification for Rigid Poly (Vinyl Chloride) (PVC) Siding

R703.11

D3737—2018E1: Practice for Establishing Allowable Properties for Structural Glued Laminated Timber (Glulam)

R502.1.3, R602.1.3, R802.1.2

D3747—79(2007): Specification for Emulsified Asphalt Adhesive for Adhering Roof Insulation Table R905.9.2, Table R905.11.2

D3909/D3909M—14(2021): Specification for Asphalt Roll Roofing (Glass Felt) Surfaced with Mineral Granules R905.2.8.2, R905.5.4, Table R905.9.2

D4022/D4022M—07(2012)e1: Specification for Coal Tar Roof Cement, Asbestos Containing

Table R905.9.2

D4318—2017e1: Test Methods for Liquid Limit, Plastic Limit and Plasticity Index of Soils

R403.1.8.1

D4434/D4434M—21: Specification for Poly (Vinyl Chloride) Sheet Roofing

Table R905.12

D4479/D4479M—2007(2018): Specification for Asphalt Roof Coatings—Asbestos-Free Table R905.9.2, Table R909.2

D4586/D4586M—2007(2018): Specification for Asphalt Roof Cement—Asbestos-Free

Table R905.9.2

D4601/D4601M—04(2020): Specification for Asphalt-Coated Glass Fiber Base Sheet Used in Roofing Table R905.9.2, R905.11.2.1

44-10 2025 CALIFORNIA RESIDENTIAL CODE

on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

REFERENCED STANDARDS

D4637/D4637M—2015(2021): Specification for EPDM Sheet Used in Single-Ply Roof Membrane

Table R905.12

D4829—21: Test Method for Expansion Index of Soils

R403.1.8.1

D4869/D4869M—2016A(2021): Specification for Asphalt-Saturated (Organic Felt) Underlayment Used in Steep Slope Roofing R905.1.1, Table R905.1.1(1)

D4897/D4897M—2016: Specification for Asphalt-Coated Glass-Fiber Venting Base Sheet Used in Roofing

Table R905.9.2

D4990—97a(2020): Specification for Coal-Tar Glass Felt Used in Roofing and Waterproofing

Table R905.9.2

D5019—07a: Specification for Reinforced Nonvulcanized Polymeric Sheet Used in Roofing Membrane

Table R905.12

D5055—19e1: Specification for Establishing and Monitoring Structural Capacities of Prefabricated Wood I-Joists

R502.1.2, R802.1.7

D5456—21e1: Standard Specification for Evaluation of Structural Composite Lumber Products

R502.1.5, R602.1.5, R802.1.4

D5516—2018: Test Method for Evaluating the Flexural Properties of Fire-Retardant-Treated Softwood Plywood Exposed to the Elevated Temperatures

R302.15.6

D5643/D5643M—2006(2018): Specification for Coal Tar Roof Cement Asbestos-Free

Table R905.9.2

D5664 — 2017: Test Methods for Evaluating the Effects of Fire-Retardant Treatments and Elevated Temperatures on Strength Properties of Fire-Retardant-Treated Lumber

R302.15.7

D5665/D5665M—99a(2021): Specification for Thermoplastic Fabrics Used in Cold-Applied Roofing and Waterproofing

Table R905.9.2

D5726—98(2020): Specification for Thermoplastic Fabrics Used in Hot-Applied Roofing and Waterproofing

Table R905.9.2

D6083/D6083M—2021: Specification for Liquid-Applied Acrylic Coating Used in Roofing Table R905.9.2, Table R905.11.2, Table R905.13.3, R905.14.2, Table R909.2

D6162/D6162M—2021: Specification for Styrene Butadiene Styrene (SBS) Modified Bituminous Sheet Materials Using a Combination of Polyester and Glass Fiber Reinforcements

Table R905.11.2

D6163/D6163M—2021: Specification for Styrene Butadiene Styrene (SBS) Modified Bituminous Sheet Materials Using Glass Fiber Reinforcements

Table R905.11.2

D6164/D6164M—2021: Specification for Styrene Butadiene Styrene (SBS) Modified Bituminous Sheet Materials Using Polyester Reinforcements

Table R905.11.2

D6222/D6222M—2016: Specification for Atactic Polypropylene (APP) Modified Bituminous Sheet Materials Using Polyester Reinforcements

Table R905.11.2

D6223/D6223M—2021: Specification for Atactic Polypropylene (APP) Modified Bituminous Sheet Materials Using a Combination of Polyester and Glass Fiber Reinforcements

Table R905.11.2

D6298—2016: Specification for Fiberglass Reinforced Styrene-Butadiene-Styrene (SBS) Modified Bituminous Sheets with a Factory Applied Metal Surface

Table R905.11.2

D6305—21: Practice for Calculating Bending Strength Design Adjustment Factors for Fire-Retardant-Treated Plywood Roof Sheathing

R302.15.6

D6380/D6380M—2003(2018): Standard Specification for Asphalt Roll Roofing (Organic Felt) R905.1.1, Table R905.1.1(1), R905.2.8.2, R905.5.4

D6464—2003A(2017): Standard Specification for Expandable Foam Adhesives for Fastening Gypsum Wallboard to Wood Framing

R702.3.1.1

on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

REFERENCED STANDARDS

D6694/D6694M—08(2013)E1: Standard Specification for Liquid-Applied Silicone Coating Used in Spray Polyurethane Foam Roofing Systems Table R905.13.3, R905.14.2, Table R909.2

D6754/D6754M—2015: Standard Specification for Ketone Ethylene Ester Based Sheet Roofing

Table R905.12

D6757/D6757M—2018: Specification for Underlayment Felt Containing Inorganic Fibers Used in Steep-Slope Roofing R905.1.1, Table R905.1.1(1)

D6841—21: Standard Practice for Calculating Design Value Treatment Adjustment Factors for Fire-Retardant-Treated Lumber

R302.15.7

D6878/D6878M—2021: Standard Specification for Thermoplastic Polyolefin-Based Sheet Roofing

Table R905.12

D6947/D6947M—2016: Standard Specification for Liquid Applied Moisture Cured Polyurethane Coating Used in Spray Polyurethane Foam Roofing System Table R905.13.3, R905.14.2, Table R909.2

D7032—2021: Standard Specification for Establishing Performance Ratings for Wood-Plastic Composite and Plastic Lumber Deck Boards, Stair Treads, Guards, and Handrails

R507.2.2, R507.2.2.1, R507.2.2.3, R507.2.2.4

D7158—D7158M—20: Standard Test Method for Wind Resistance of Asphalt Shingles (Uplift Force/Uplift Resistance Method) R905.2.4.1, Table R905.2.4.1

D7254—21: Standard Specification for Polypropylene (PP) Siding Table R703.3(1), R703.14

D7425/D7425M—13(2019): Standard Specification for Spray Polyurethane Foam Used for Roofing Applications

R905.13.2

D7672—19: Standard Specification for Evaluating Structural Capacities of Rim Board Products and Assemblies

R502.1.7, R602.1.7, R802.1.6

D7793—20: Standard Specification for Insulated Vinyl Siding Table R703.3(1), R703.13

D8257/D8257M—20: Standard Specification for Mechanically Attached Polymeric Roof Underlayment Used in Steep Slope Roofing R905.1.1, Table R905.1.1(1)

E84—21a: Standard Test Method for Surface Burning Characteristics of Building Materials

R202, R302.9.3, R302.9.4, R302.10.1, R302.10.2, R302.15, R507.2.2.2, R703.14.3

E96/E96M—21: Standard Test Methods for Gravimetric Determination of Water Vapor Transmission Rate of Materials R202, Table R806.5

E108— 2020a : Standard Test Methods for Fire Tests of Roof Coverings

R302.2.4, R902.

E119—20: Standard Test Methods for Fire Tests of Building Construction and Materials Table R302.1(1), Table R302.1(2), R302.2.1, R302.2.2, R302.3, R302.4.1, R302.11.1, R606.2.2

E136— 2022: Standard Test Method for Assessing Combustibility of Materials Using a Vertical Tube Furnace at 750 Degrees C

R202, R302.11

E283/E283M—19: Standard Test Method for Determining Rate of Air Leakage Through Exterior Windows, Skylights, Curtain Walls, and Doors Under Specified Pressure Differences Across the Specimen

R202

E330/E330M—14(2021): Test Method for Structural Performance of Exterior Windows, Doors, Skylights and Curtain Walls by Uniform Static Air Pressure Difference

R609.4, R609.5, R609.6.2, R703.1.2

E331—2000(2016): Test Method for Water Penetration of Exterior Windows, Skylights, Doors, and Curtain Walls by Uniform Static Air Pressure Difference

R703.1.1

E814—2013A(2017): Standard Test Method for Fire Tests of Penetration Firestop Systems

R302.4.1.2

E970—2017: Standard Test Method for Critical Radiant Flux of Exposed Attic Floor Insulation Using a Radiant Heat Energy Source

R302.10.4

E1592—2005(2017): Test Method for Structural Performance of Sheet Metal Roof and Siding Systems by Uniform Static Air Pressure Difference

R905.10.5

44-12 2025 CALIFORNIA RESIDENTIAL CODE

on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

REFERENCED STANDARDS

E1602—2003(2017): Guide for Construction of Solid Fuel Burning Masonry Heaters

R1002.2

E1745—17: Standard Specification for Plastic Water Vapor Retarders Used in Contact with Soil or Granular Fill under Concrete Slabs

R506.3.3

E1886—19: Standard Test Method for Performance of Exterior Windows, Curtain Walls, Doors, and Impact Protective Systems Impacted by Missile(s) and Exposed to Cyclic Pressure Differentials R301.2.1.2, R609.6.1, R609.6.2, Table R703.11.2

E1996—20: Specification for Performance of Exterior Windows, Curtain Walls, Doors, and Impact Protective Systems Impacted by Windborne Debris in Hurricanes

R301.2.1.2, R609.6.1, R609.6.2

E2178—21a: Standard Test Method for Determining Air Leakage Rate and Calculation of Air Permeance of Building Materials

R202

E2273—2018: Standard Test Method for Determining the Drainage Efficiency of Exterior Insulation and Finish Systems (EIFS) Clad Wall Assemblies

R703.9.2

E2556/E2556M—2010(2016): Standard Specification for Vapor Permeable Flexible Sheet Water-resistive Barriers Intended for Mechanical Attachment

R703.2

E2568—2017A: Standard Specification for PB Exterior Insulation and Finish Systems

R703.9.1, R703.9.2

E2570/E2570M—07(2019): Standard Test Methods for Evaluating Water-Resistive Barrier (WRB) Coatings Used under Exterior Insulation and Finish Systems (EIFS) or EIFS with Drainage

R703.9.2

E2632/E2632M—2013e1: Standard Test Method for Evaluating the Under-Deck Fire Test Response of Deck Materials:

R337.9.3, R337.9.4, R337.9.4.1, R337.9.5

E2634—2018: Standard Specification for Flat Wall Insulating Concrete Form (ICF) Systems

R404.1.3.3.6.1, R608.4.4

E2634—2018: Standard Specification for Flat Wall Insulating Concrete Form (ICF) Systems

R404.1.3.3.6.1, R608.4.4

E2707—2015: tandard Test Method for Determining Fire Penetration of Exterior Wall Assemblies Using a Direct Flame Impingement Exposure

R337.7.3, R337.7.3.1, R337.8.3

E2726/E2726M—2012a: tandard Test Method for Evaluating the Fire-Test-Response of Deck Structures to Burning Brands

R337.9.3, R337.9.4, R337.9.4.2

E2886/E2886M—2014: Standard Test Method for Evaluating the Ability of Exterior Vents to Resist the Entry of Embers and Direct Flame Impingent

R337.6.2, R337.6.3

*ASTM E2886, Amended Sections as follows:

Revise Sections 10.1.8.3, 10.1.8.4 and 10.1.8.5 as follows: 10.1.8.3 Report the temperatures of the unexposed temperatures on the unexposed side of the vent during the entire optional Insula- tion Test of the Flame Intrusion.

10.1.8.4 The maximum temperature reached during the test by any one of the unexposed surface thermocouples during the entire optional Insulation Test of the Flame Intrusion Test. 10.1.8.5 The maximum average temperature reached during the test by all of the unexposed surface thermocouples during the entire optional Insulation Test of the Flame Intrusion Test.

E2925—19a: Standard Specification for Manufactured Polymeric Drainage and Ventilation Materials Used to Provide a Rainscreen Function

R703.7.3.2

E2957—2015: Standard Test Method for Resistance to Wildfire Penetration of Eaves, Soffits and Other Projections

R337.7.5, R337.7.6, R337.7.8, R337.7.10

*ASTM E2957, Amended Sections as follows:

Add new Section 12.5 as follows:

be run. All of the additional tests must meet the Conditions of Acceptance. 1. Absence of flame penetration of the eaves or horizontal projection assembly at any time. 2. Absence of structural failure of the eaves or horizontal projection subassembly at any time. 3. Absence of sustained combustion of any kind at the conclusion of the 40-minute test.

on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

REFERENCED STANDARDS

F844—19: Standard Specification for Washers, Steel, Plain (Flat), Unhardened for General Use

Table R507.2.3

F1554—20: Specification for Anchor Bolts, Steel, 36, 55 and 105-ksi Yield Strength

R608.5.2.2

F1667—21a: Specification for Driven Fasteners: Nails, Spikes, and Staples Table R507.2.3, Table R602.3(1), R703.3.3, R703.6.3, Table R703.15.1, Table R703.15.2, R905.2.5

F2090—21: Specification for Window Fall Prevention Devices with Emergency Escape (Egress) Release Mechanisms

R319.1.1, R321.2.1, R321.2.2

F2374: Standard Practice for Design, Manufacture, Operation, and Maintenance of Inflatable Amusement Devices

AWC American Wood Council 222 Catoctin Circle SE, Suite 201 Leesburg, VA 20175

ANSI/AWC NDS—2024: National Design Specification (NDS) for Wood Construction—with 2018 Supplement R404.2.2, R502.2, Table R503.1, R507.2.1, R602.3, R608.9.2, R608.9.3, Table R703.15.1, Table R703.15.2, R802.2

ANSI/AWC PWF—2021: Permanent Wood Foundation Design Specification

R304.3.2, R401.1, R404.2.3

ANSI/AWC WFCM—2024: Wood Frame Construction Manual for One- and Two-Family Dwellings R301.1.1, R301.2.1.1, R602.10.8.2, Figure R608.9(9), R608.9.2, R608.9.3, R608.10

AWC STJR—2024: Span Tables for Joists and Rafters

R502.3, R802.4.1, R802.5.1

AWPA American Wood Protection Association P.O. Box 361784 Birmingham, AL 35236-1784

C1—03: All Timber Products—Preservative Treatment by Pressure Processes

R902.2

M4—21: Standard for the Handling, Storage, Field Fabrication, and Field Treatment of Preservative-treated Wood Products:

R304.1.1, R305.1.2

U1—23: USE CATEGORY SYSTEM: User Specification for Treated Wood Except Commodity Specification H R304.1, R402.1.2, R504.3, R703.6.3, R905.7.6, Table R905.8.5, R905.8.7

CEN European Committee for Standardization (EN) Rue de la Science 23 Brussels, Belgium B - 1040

EN 15250—2007: Slow Heat Release Appliances Fired by Solid Fuel Requirements and Test Methods

R1002.2

CPA Composite Panel Association 19465 Deerfield Avenue, Suite 306 Leesburg, VA 20176

ANSI A135.4—2012(R2020): Basic Hardboard Table R602.3(2)

ANSI A135.5—2012(R2020): Prefinished Hardboard Paneling

R702.5

ANSI A135.6—2012(R2020): Engineered Wood Siding

R703.5

ANSI A135.7—2012(R2020): Engineered Wood Trim

R703.5

ANSI A208.1—2016: Particleboard

R503.3.1, R602.1.9, R605.1

CPSC Consumer Product Safety Commission 4330 East-West Highway Bethesda, MD 20814

16 CFR, Part 1201 (2002): Safety Standard for Architectural Glazing Material R324.1.1, R324.3.1, Table R324.3.1(1)

16 CFR, Part 1209 (2002): Interim Safety Standard for Cellulose Insulation

R302.10.3

16 CFR, Part 1404 (2002): Cellulose Insulation

R302.10.3

44-14 2025 CALIFORNIA RESIDENTIAL CODE

on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

REFERENCED STANDARDS

CSA CSA Group 8501 East Pleasant Valley Road Cleveland, OH 44131-5516

AAMA/WDMA/CSA 101/I.S.2/A440—22: North American Fenestration Standard/Specification for Windows, Doors, and Skylights

R609.3

ASME A17.1—2022/CSA B44—22: Safety Code for Elevators and Escalators

R323.1

CSA O325—21: Construction Sheathing

R503.2.1, R602.1.8, R604.1, R803.2.1

O437-Series—93(R2011): Standards on OSB and Waferboard

R503.2.1, R602.1.8, R604.1, R803.2.1

CSSB Cedar Shake & Shingle Bureau P.O. Box 1178 Sumas, WA 98295-1178

CSSB—97: Grading and Packing Rules for Western Red Cedar Shakes and Western Red Cedar Shingles of the Cedar Shake and Shingle Bureau R702.6, R703.6, Table R905.7.4

DASMA Door & Access Systems Manufacturers Association International 1300 Sumner Avenue Cleveland, OH 44115-2851

ANSI/DASMA 108—2017: Standard Method for Testing Sectional Doors, Rolling Doors and Flexible Doors: Determination of Structural Performance Under Uniform Static Air Pressure Difference

R609.4

ANSI/DASMA 115—2017: Standard Method for Testing Sectional Doors, Rolling Doors and Flexible Doors: Determination of Structural Performance Under Missile Impact and Cyclic Wind Pressure

R301.2.1.2

DHA Decorative Hardwoods Association (formerly HPVA) 42777 Trade West Drive Sterling, Virginia 20166

ANSI/HPVA HP-1—2022: American National Standard for Hardwood and Decorative Plywood

R702.5

DOC U.S. Department of Commerce 1401 Constitution Avenue, NW Washington, DC 20230

PS 1—22: Structural Plywood R404.2.1, Table R404.2.3, R503.2.1, R602.1.8, R604.1, R803.2.1

PS 2—18: Performance Standard for Wood Structural Panels

R404.2.1, Table R404.2.3, R503.2.1, R602.1.8, R604.1, R803.2.1

PS 20—20: American Softwood Lumber Standard

R404.2.1, R502.1.1, R602.1.1, R802.1.1

FEMA Federal Emergency Management Agency 500 C Street SW Washington, DC 20472

FEMA TB-2—23: Flood Damage-resistant Materials Requirements

R306.1.8

FEMA TB-11—23: Crawlspace Construction for Buildings Located in Special Flood Hazard Area

R408.7

FGIA Fenestration & Glazing Industry Alliance 1900 E. Golf Road, Suite 1250 Schaumburg, IL 60173

450—20: Performance Rating Method for Mulled Combination Assemblies, Composite Units, and Other Mulled Fenestration Systems

R609.8

506—16: Voluntary Specifications for Impact and Cycle Testing of Fenestration Products

R609.6.1

711—22: Specification for Self-Adhering Flashing Used for Installation of Exterior Wall Fenestration Products

R703.4

712—23: Voluntary Specification for Mechanically Attached Flexible Flashing

R703.4

714—23: Voluntary Specification for Liquid-Applied Flashing Used to Create a Water-Resistive Seal around Exterior Wall Openings in Buildings

R703.4

on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

REFERENCED STANDARDS

AAMA/NSA 2100—22: Specifications for Sunrooms

R301.2.1.1.1

AAMA/WDMA/CSA 101/I.S.2/A440—22: North American Fenestration Standard/Specification for Windows, Doors, and Skylights

R324.6.9, R609.3

FM FM Approvals Headquarters Office Norwood, MA 02062

4474—2020: American National Standard for Evaluating the Simulated Wind Uplift Resistance of Roof Assemblies Using Static Positive and/or Negative Differential Pressures

R905.4.4.1, R905.9.4, R905.10.5, R905.11.4, R905.12.4, R905.13.4, R905.14.4

ANSI/FM 4880—(2017): American National Standard for Evaluating the Fire Performance of Insulated Building Panel Assemblies and Interior Finish Materials

R303.6

GA Gypsum Association 6525 Belcrest Road, Suite 480 Hyattsville, MD 20782

GA-253—2021: Application of Gypsum Sheathing Table R602.3(1)

IAPMO IAPMO Group 4755 E. Philadelphia Street Ontario, CA 91761-USA

CMC—25: California Mechanical Code

R325.2, R325.2.1, R325.3, R325.4.1, R330.9. R408.3, R408.4, R807.1, R1003.11.3, R1003.14

CPC—25: California Plumbing Code R309.3.1.1, R309.3.2.3, Table R309.3.6.2(1), R309.3.8.1, R327.1, R329.2, R903.4.1

ICC International Code Council, Inc. 200 Massachusetts Avenue, NW, Suite 250 Washington, DC 20001

CBC—25: California Building Code R101.2, R202, R301.1.1, R301.1.3, R301.2.1.1, R301.2.2.1.1, R301.2.2.1.2, R301.3, Table R302.1(1), Table R302.1(2), R302.2.1, R302.2.2, R302.3, R302.15.4, R322.1, R322.3, R324.5, R403.1.8, Table R602.10.3(3), Table R606.12.2.1, R609.2, R905.10.3

CEBC—25: California Existing Building Code [®]

R110.2, N1109.2

CFC—25: California Fire Code [®]

R102.6, R329.2, N1109.2, M2201.7, G2402.3, G2412.2

CWUIC—25: California Wildland-Urban Interface Code

R102.8, R337, R806.1.1, R907.1.1

ICC 400—2022: Standard on the Design and Construction of Log Structures

R301.1.1, R502.1.4, R602.1.4, R703.1, R802.1.3

ICC 500—2020: ICC/NSSA Standard for the Design and Construction of Storm Shelters

R307.1

ICC 600—2020: 2020 Standard for Residential Construction in High-Wind Regions

R301.2.1.1

ICC 1100—2019: Standard for Spray-applied Polyurethane Foam Plastic Insulation

R303.1.1

IPMC—24: International Property Maintenance Code [®]

R102.6

ISO International Organization for Standardization Chemin de Blandonnet 8 Geneva, Switzerland CP 401 - 1214

8336—2009: Fibre-cement Flat Sheets—Product Specification and Test Methods Table R503.2.1.1(1), Table R503.2.1.1(2), Table R602.3(2), Table R702.4.2, R703.10.1, R703.10.2

44-16 2025 CALIFORNIA RESIDENTIAL CODE

on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

REFERENCED STANDARDS

NFPA National Fire Protection Association 1 Batterymarch Park Quincy, MA 02169-7471

13D— 25 : Standard for the Installation of Sprinkler Systems in One- and Two-Family Dwellings and Manufactured Homes as amended*

R309.1.1, R309.2.1, R309.3.1, R309.3.1.1, R309.3.2.3, R309.3.6.1, R329.6.2.1

*See California Fire Code for amendments

*NFPA 13D, Amended Sections as follows:

Revise Section 6.2.2 to read as follows: 6.2.2 Where a well, pump, tank or combination thereof is the source of supply for a fire sprinkler system, the configuration for the system shall be one of the following: (1) The water supply shall serve both domestic and fire sprinkler systems, (a) A test connection shall be provided downstream of the pump that creates a flow of water equal to the smallest sprinkler on the system. The connection shall return water to the tank. (b) Any disconnecting means for the pump shall be approved. (c) A method for refilling the tank shall be piped to the tank. (d) A method of seeing the water level in the tank shall be provided without having to open the tank. (e) The pump shall not be permitted to sit directly on the floor. (2) A stand-alone tank is permitted if the following conditions are met: (a) The pump shall be connected to a 220-volt circuit breaker shared with a common household appliance (e.g., range, oven, dryer), (b) The pump shall be a stainless steel 240-volt pump, (c) A valve shall be provided to exercise the pump. The discharge of the exercise valve shall drain to the tank, and (d) A sign shall be provided stating “Valve must be opened monthly for 5 minutes.” (e) A means for automatically refilling the tank level, so that the tank capacity will meet the required water supply duration in minutes, shall be provided. (f) A test connection shall be provided downstream of the pump that creates a flow of water equal to the smallest sprinkler on the system. The connection may return water to the tank. (g) Any disconnecting means for the pump shall be approved. (h) A method for refilling the tank shall be piped to the tank. (i) A method of seeing the water level in the tank shall be provided without having to open the tank. (j) The pump shall not be permitted to sit directly on the floor.

Add new Section 6.2.2.1 to read as follows: 6.2.2.1 Where a fire sprinkler system is supplied by a stored water source with an automatically operated means of pressurizing the system other than an electric pump, the water supply may serve the sprinkler system only.

Add new Section 6.2.4 to read as follows: 6.2.4 Where a water supply serves both domestic and fire sprinkler systems, 5 gpm (19 L/min) shall be added to the sprinkler system demand at the point where the systems are connected, to determine the size of common piping and the size of the total water supply requirements where no provision is made to prevent flow into the domestic water system upon operation of a sprinkler. For multipurpose piping systems, the 5 gpm (19 L/min) demand shall be added at the domestic connection nearest the design area. This demand may be split between two domestic connections at 2.5 gpm (10 L/min) each.

size of common piping and the size of the total water supply_ requirements where no provision is made to prevent flow into the domestic water system upon operation of a sprinkler. For multipurpose piping systems, the 5 gpm (19 L/min) demand shall be added at the domestic connection nearest the design area. This demand may be split between two domestic connections at 2.5 gpm (10 L/min) each.

Revise Section 8.3.4 to read as follows: 8.3.4* Sprinklers shall not be required in detached garages, open attached porches, carports with no habitable space above and similar structures.

Add new Section 8.3.10 and 8.3.10.1 as follows: 8.3.11 Solar photovoltaic panel structures 8.3.11.1 Sprinklers shall be permitted to be omitted from the following structures: (1) Solar photovoltaic panel structures with no use underneath. Signs may be provided, as determined by the enforcing agency prohibiting any use underneath including storage. (2) Solar photovoltaic (PV) panels supported by framing that have sufficient uniformly distributed and unobstructed openings throughout the top of the array (horizontal plane) to allow heat and gases to escape, as determined by the enforcing agency.

13R— 25 : Standard for the Installation of Sprinkler Systems in Low-Rise Residential Occupancies

31— 24 : Standard for the Installation of Oil-Burning Equipment

58— 24 : Liquefied Petroleum Gas Code

68—13: Standard on Explosion Protection by Deflagration Venting

70—23: National Electrical Code

*See California Electrical Code for amendments

72—22: National Fire Alarm and Signaling Code as amended*

RR310.1, R310.3.3, R310.7.1, R311.6, R311.7.1, R311.7.2, R335.5.2.1, R335.5.2.4

*NFPA 72, Amended Sections as follows:

Revise Section 10.3.1 to read as follows: 10.3.1 Equipment constructed and installed in conformity with this code shall be listed for the purpose for which it is used. Fire alarm

on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

REFERENCED STANDARDS

systems and components shall be California State Fire Marshal approved and listed in accordance with California Code of Regulations, Title 19, Division 1.

Revise Section 10.3.3 to read as follows: 10.3.3 All devices and appliances that receive their power from the initiating device circuit or signaling line circuit of a control unit shall be California State Fire Marshal listed for use with the control unit.

Revise Section 12.3.8.1 to read as follows: 12.3.8.1 The outgoing and return (redundant) circuit conductors shall be permitted in the same cable assembly (i.e., multiconductor cable), enclosure or raceway only under the following conditions: (1) For a distance not to exceed 10 ft (3.0 m) where the outgoing and return conductors enter or exit the initiating device, notifi- cation appliance or control unit enclosures (2) Single drops installed in the raceway to individual devices or appliances (3) *In a single room not exceeding 1000 ft [2] (93 m [2] ) in area, a drop installed in the raceway to multiple devices or appliances that does not include any emergency control function devices (4) Where the vertically run conductors are contained in a 2-hour rated cable assembly, or enclosed (installed) in a 2-hour rated enclosure or a listed circuit integrity (C.I.) cable, which meets or exceeds a 2-hour fire resistive rating.

Revise Section 14.4.6.1 to read as follows: 14.4.6.1 Testing. Household fire alarm systems shall be tested in accordance with the manufacturer’s published instructions according to the methods of Table 14.4.3.2.

Revise Section 17.16 to read as follows:

A fire extinguisher electronic monitoring device shall indicate those conditions for a specific fire extinguisher required by California Code of Regulations, Title 19, Division 1, Chapter 1, Section 574.2 (c) and California Fire Code to a fire alarm control unit.

Revise Section 23.8.1.2 to read as follows: 23.8.1.2 Positive alarm sequence. 23.8.1.2.1 Systems that have positive alarm features complying with 23.8.1.2 shall be permitted if approved by the authority having jurisdiction. Operation of a patient room smoke detector in Group I-2 and R-2.1 occupancies shall not include a positive alarm sequence feature.

Revise Section 23.8.5.1.2 to read as follows: 23.8.5.1.2* Where connected to a supervising station, fire alarm systems employing automatic fire detectors or waterflow detection devices shall include a manual fire alarm box to initiate a signal to the supervising station. Exception: Fire alarm systems dedicated to elevator recall control, and supervisory service and fire sprinkler monitoring as permit- ted in Section 17.15 of NFPA 72.

Revise Section 23.8.5.4.1 to read as follows: 23.8.5.4.1 Systems equipped with alarm verification features shall be permitted under the following conditions: (1) The alarm verification feature is not initially enabled unless conditions or occupant activities that are expected to cause nuisance alarms are anticipated in the area that is protected by the smoke detectors. Enabling of the alarm verification feature shall be protected by password or limited access. (2) A smoke detector that is continuously subjected to a smoke concentration above alarm threshold does not delay the system functions of Sections 10.7 through 10.16, 23.8.1.1 or 21.2.1 by more than 30 seconds. (3) Actuation of an alarm-initiating device other than a smoke detector causes the system functions of Sections 10.7 through 10.16, 23.8.1.1 or 21.2.1 without additional delay. (4) The current status of the alarm verification feature is shown on the record of completion (see Figure 7.8.2(a), item 4.3). (5) Operation of a patient room smoke detector in I-2 and R-2.1 Occupancies shall not include an alarm verification feature.

Revise Section 29.3.1 to read as follows: 29.3.1 All devices, combinations of devices and equipment to be installed in conformity with this chapter shall be approved and listed by the California State Fire Marshal for the purposes for which they are intended.

Revise Section 29.8.2.1.1 to read as follows: 29.8.2.1.1 Smoke and Heat Alarms.* Where connected to a supervising station unless exempted by applicable laws, codes or stan- dards, smoke or heat alarms used to provide a fire-warning function, and when two or more alarms are installed within a dwelling unit, suite of rooms, or similar area, shall be arranged so that the operation of any smoke or heat alarm causes all alarms within these loca- tions to sound.

Note: Exception to 29.8.2.1.1 not adopted by the SFM

Add Section 29.10.2.1 to read as follows: 29.10.2.1 The alarm verification feature shall not be used for household fire warning equipment.

Add Section 29.10.6.8.1 to read as follows: 29.10.6.8.1 The alarm verification feature shall not be used for household fire warning equipment.

211— 24 : Standard for Chimneys, Fireplaces, Vents, and Solid Fuel-Burning Appliances

R1002.5

259—23: Standard for Test Method for Potential Heat of Building Materials

R303.5.7, R303.5.8

275—22: Standard Method of Fire Tests for the Evaluation of Thermal Barriers

R303.4

44-18 2025 CALIFORNIA RESIDENTIAL CODE

on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

REFERENCED STANDARDS

276—23: Standard Method of Fire Test for Determining the Heat Release Rate of Roofing Assemblies with Combustible Above- Deck Roofing Components

R906.1

286— 24 : Standard Methods of Fire Tests for Evaluating Contribution of Wall and Ceiling Interior Finish to Room Fire Growth

R302.9.4, R303.6

501—22: Standard on Manufactured Housing

R202

720—15: Standard for the Installation of Carbon Monoxide (CO) Detection and Warning Equipment

R311.7.1, R311.7.2

PCA Portland Cement Association 5420 Old Orchard Road Skokie, IL 60077

100—17: Prescriptive Design of Exterior Concrete Walls for One- and Two-family Dwellings (Pub. No. PCA 100.3)

R301.2.2.5, R404.1.3, R404.1.3.2.1, R404.1.3.2.2, R404.1.3.4, R404.1.4.2, R608.1, R608.2, R608.5.1, R608.9.2, R608.9.3

PTI Post-Tensioning Institute 38800 Country Club Drive Farmington Hills, MI 48331

PTIDC10.5—19: Standard Requirements for Design and Analysis of Shallow Concrete Foundations on Expansive and Stable Soils

R506.2

SBCA Structural Building Components Association 6300 Enterprise Lane Madison, WI 53719

BCSI—2018: Building Component Safety Information—Guide to Good Practice for Handling, Installing, Restraining & Bracing of Metal Plate Connected Wood Trusses

R502.12.2, R802.10.3

CFS-BCSI—(updated June 2016): Cold-formed Steel Building Component Safety Information (CFSBCSI)—Guide to Good Practice for Handling, Installing & Bracing of Cold-formed Steel Trusses

R505.1.3, R804.3.6

SFM State of California Department of Forestry and Fire Protection, Office of the State Fire Marshal, P.O. Box 944246, Sacramento, CA

944246-2460

SFM—12-3: Releasing Systems for Security Bars in Dwellings

SFM 12-7A-1: Exterior Wall Siding and Sheathing

SFM 12-7A-2: Exterior Window

SFM 12-7A-3: Horizontal Protection Underside

SFM 12-7A-4: Decking

SFM 12-7A-4A: Decking Alternate Method A

(The Office of the State Fire Marshal standards referred to above are found in the California Code of Regulations, Title 24, Part 12.)

TMS The Masonry Society 105 South Sunset Street, Suite Q Longmont, CO 80501

402—2022: Building Code Requirements for Masonry Structures

R404.1.2, R606.1, R606.1.1, R606.12.1, R606.12.2.3.1, R606.12.3.1, R703.12,

403—2017: Direct Design Handbook for Masonry Structures

R606.1, R606.1.1, R606.12.1, R606.12.3.1

404—2023: Standard for the Design of Architectural Cast Stone

R606.1

602—2022: Specification for Masonry Structures

R606.2.10, R606.2.13, R703.12

TPI Truss Plate Institute 2670 Crain Highway, Suite 203 Waldorf, MD 20601

ANSI/TPI 1—2022: National Design Standard for Metal Plate Connected Wood Truss Construction

R502.12.1, R802.10.2

on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

REFERENCED STANDARDS

UBC International Code Council, Inc. 500 New Jersey Avenue, NW 6th Floor Washington, DC 20001

UBC Standard 15-2: Test Standard for Determining the Fire Retardancy of Roof-covering Materials

R902

UBC Standard 15-3: Wood Shakes

R902

UBC Standard 15-4: Wood Shingles

R902

UL UL LLC 333 Pfingsten Road Northbrook, IL 60062

55A—2004: Materials for Built-Up Roof Coverings

R905.9.2

103—2010: Factory-built Chimneys for Residential Type and Building Heating Appliances—with Revisions through September 2021

R202, R1005.3

127—2011: Factory-Built Fireplaces—with Revisions through February 2020

R1001.11, R1004.1, R1004.4, R1004.5, R1005.4

217—2015: Smoke Alarms—with Revisions through April 2021

R310.1.1, R311.1.1

263—2011: Fire Test of Building Construction and Materials—with Revisions through August 2021 Table R302.1(2), R302.2, R302.2.1, R302.2.2, R302.4.1, R302.11.1, R606.2.2

268—2016: Smoke Detectors for Fire Alarm Systems—with Revisions through October 2019

R310.7.1, R310.7.4, R311.7.4

325—2017: Door, Drapery, Gate, Louver and Window Operators and Systems—with Revisions through February 2020

R317.4

580—2006: Test for Uplift Resistance of Roof Assemblies—with Revisions through March 2019

R905.4.4.1, R905.9.4, R905.10.5, R905.11.4, R905.12.4, R905.13.4, R905.14.4

641—2010: Type L Low-Temperature Venting Systems—with Revisions through April 2018

R202, R1003.11.5

723—2018: Standard for Test for Surface Burning Characteristics of Building Materials

R202, R302.9.3, R302.9.4, R302.10.1, R302.10.2, R302.15, R303.3, R303.5.9, R303.5.11, R507.2.2.2, R703.14.3

790— Edition 9—2022 : Standard Test Methods for Fire Tests of Roof Coverings—with Revisions through October 2018

R302.2.4, R902.1

907—2016: Fireplace Accessories

R1001.13

959—2010: Medium Heat Appliance Factory-Built Chimneys—with Revisions through August 2019

R1005.6

1040—1996: Fire Test of Insulated Wall Construction—with Revisions through April 2017

R303.6

1256—2002: Fire Test of Roof Deck Construction—with Revisions through August 2018

R906.1

1479—2015: Fire Tests of Penetration Firestops—with Revisions through May 2021

R302.4.1.2

1482—2011: Solid-Fuel Type Room Heaters—with Revisions through February 2020

R1002.2, R1002.5

1618—2015: Wall Protectors, Floor Protectors, and Hearth Extensions—with Revisions through January 2018

R1004.2

1703—2002: Flat-Plate Photovoltaic Modules and Panels—with Revisions through November 2019

R329.3.1, R902.4

1715—1997: Fire Test of Interior Finish Material—with revisions through April 2017

R303.6

1741—2010: Inverters, Converters, Controllers and Interconnection System Equipment with Distributed Energy Resources—with Revisions through June 2021

R329.3.1, R330.6

44-20 2025 CALIFORNIA RESIDENTIAL CODE

on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

REFERENCED STANDARDS

1777—2015: Chimney Liners—with Revisions through April 2019

R1003.11.1, R1003.18

1897—2015: Uplift Tests for Roof Covering Systems—with Revisions through September 2020

R905.4.4.1, R905.9.4, R905.10.5, R905.11.4, R905.12.4, R905.13.4, R905.14.4

2034—2017: Single and Multiple Station Carbon Monoxide Alarms—with Revisions through September 2018

R310.1.1, R311.1.1

2075—2013: Gas and Vapor Detectors and Sensors—with Revisions through August 2021

R310.7.4, R311.7.1, R311.7.4

2200—2020: Stationary Engine Generator Assemblies

R331.1

2703—2014: Mounting Systems, Mounting Devices, Clamping/Retention Devices and Ground Lugs for Use with Flat-Plate Photovoltaic Modules and Panels—with Revisions through March 2021

R902.4

3741—2020: Photovoltaic Hazard Control

R329.6, R329.6.3, R329.6.4

7103—2019: Outline of Investigation for Building-Integrated Photovoltaic Roof Coverings R902.3, R905.15.4, Table R905.15.6, R905.16.5, R905.16.7

9540 Edition 2—2020 : Standard for Energy Storage Systems and Equipment—with Revisions through April 2021

330.1, 330.4, R330.2, R330.6

9540A Edition 4 —2019: Test Method for Evaluating Thermal Runaway Fire Propagation in Battery Energy Storage Systems

R330.1, R330.2, R330.4, R330.6

61730-1—2017: Photovoltaic (PV) Module Safety Qualification — Part 1: Requirements for Construction—with Revisions through April 2020

R329.3.1

61730-2—2017: Photovoltaic (PV) Module Safety Qualification — Part 2: Requirements for Testing —with Revisions through April

2020

R329.3.1, R905.15.4, R905.16.5

UL 2202—2009: Electric Vehicle (EV) Charging System—with revisions through February 2018

R317.6

UL 2594—2016: Standard for Electric Vehicle Supply Equipment

R317.6

ULC ULC 13775 Commerce Parkway Richmond, BC V6V 2V4

CAN/ULC S 102.2—2018: Standard Method of Test for Surface Burning Characteristics of Building Materials and Assemblies

R302.10.1, R302.10.2

WDMA Window and Door Manufacturers Association 2025 M Street NW, Suite 800 Washington, DC 20036-3309

AAMA/WDMA/CSA 101/I.S.2/A440—22: North American Fenestration Standard/Specification for Windows, Doors, and Skylights

R324.6.9, R609.3

I.S. 11—23: Industry Standard Analytical Method for Design Pressure (DP) Ratings of Fenestration Products

R324.6.9.1, R609.3.1

WMA World Millwork Alliance (formerly Association of Millwork Distributors Standards AMD) 10047 Robert Trent Parkway New Port Richey, FL 34655-4649

ANSI WMA 100—2023: Standard Method of Determining Structural Performance Ratings of Side-Hinged Exterior Door Systems and Procedures for Component Substitution

R609.3

on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

44-22 2025 CALIFORNIA RESIDENTIAL CODE

on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

CALIFORNIA RESIDENTIAL CODE – MATRIX ADOPTION TABLE

APPENDIX AA – BOARD OF APPEALS

(Matrix Adoption Tables are nonregulatory, intended only as an aid to the code user. See Chapter 1 for state agency authority and building applications.)

on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

APPENDIX AA-2 2025 CALIFORNIA RESIDENTIAL CODE

on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.